Shellfish Allergy

A shellfish allergy is most likely to occur in adults for the first time than any other allergy existing. Shellfish allergy will occur with two classes of foods; mollusks, and crustaceans. Mollusks include the oysters, clams, and mussels family. Crustaceans include the lobster, crab, and shrimp family. Shrimp is the most allergenic of the shellfish group. Anyone who has been diagnosed with a shellfish allergy has been advised to avoid ALL shellfish.

Most people do not know that different types of shellfish obtain high rates of cross reactions with other types of shellfish. Tropomyosin is a protein that is very common and the culprit of a shellfish allergy. This is horrible; but this protein is also found in cockroaches and dust mites. This is alarming evidence of cross-reactivity between insects and shellfish. A shellfish allergy is a major cause of anaphylactic shock. Hives is a symptom of shellfish allergy, causing swelling and redness beneath the skin.

Omega-3 supplements potentially cause a shellfish allergy. These can often be derived from seafood. Cod liver oil is a common source that is used to make these supplements. If you happen to seek a great supplement enhanced with protein, steer clear of any supplements made from this oil. Time should be taken to read the ingredients on the bottles of supplements, to avoid a reaction to your shellfish allergy.

Those who suffer from a shellfish allergy should avoid mollusks and crustaceans. Did you know there are some people, who through testing, are diagnosed as not being allergic to mollusks, but can safely eat crustaceans? Folks who happen to have a shellfish allergy to mollusks need to avoid:


  • Clams
  • Oysters
  • Mussels
  • Abalone
  • Scallops
  • Cockles
  • Squid (Calimari)
  • Octopus
  • Whelks
  • Snails (Escargot)
  • Limpets

Folks who suffer from shellfish allergy should steer clear of crustaceans:

  • Shrimp
  • Lobster
  • Crawfish
  • Crab
  • Prawns
  • Langoustines
  • Sea Urchins

It is very easy to avoid problems with your shellfish allergy; although it may take a certain amount of willpower for those who used to eat shellfish and developed a shellfish allergy. You may want to proceed with caution because shellfish are included in Worcestershire sauce, some salad dressings, and a plethora of other sauces. You may want to start reading labels closely for these allergens.

When dealing with a shellfish allergy; it is imperative to become highly cautious. Anaphylactic shock is caused by allergens in shellfish. This is the worse food allergy a person can possess. You should always keep the lines of communication open with an allergist and be prepared in case anaphylactic shock takes place. Allergists can prescribe epinephrine which should be carried with you at all times.